Obviously, one of the central facts of Homer's Iliad was confirmed when archaeologists found Troy.

But were there any other details of Iliad (such as existance of Atreidae dynasty, Agamemnon actually having a military attack on Troy, existance of Odysseus as a ruler of Ithaca, etc...) that were confirmed scientifically - e.g. from reliable independent historical sources, archaeological finds, or other branches of sciences [1]

[1] - as a generic example of "other branches", astronomical confirmation of some celestial event mentioned, or some geological finds.

1 Answer
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In the story of the Trojan War, if not necessarily in the text of Homer's Iliad, Agamemnon's wife Clytemnestra learns of the fall of Troy via a relay of fire beacons. In Aeschylus' Agamemnon, she's said to have received the news in Mycenae (approximately 400 miles away) the very same night that Troy fell, and Aeschylus describes the path of the transmitted message. Two men in the 20th century, one a German historian and the other a communications engineer, each traced that path and deemed the relay as being feasible. This is briefly mentioned in James Gleick's The Information and described in somewhat greater detail here (see the section "Fire Beacons").

This may not meet the definition of scientific or archaeological confirmation, but it does lend some additional credence to the ancient texts.

I'm torn... on one hand it's a good answer. On the other this was not QUITE what I had in mind when asking (no fault of yours :)
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DVKFeb 2 '13 at 1:42

No, I agree, my answer probably falls short of what you're looking for. In fairness, there is no currently known evidence that proves the historicity of Homer's Iliad. But there is a growing body of circumstantial evidence seeming to indicate that a conflict did indeed take place around 1200 BC.
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Mark42Feb 2 '13 at 5:29